E-liquid filling structure and assembly and e-liquid injection method

ABSTRACT

An e-liquid filling structure, including a drip tip with an e-liquid cartridge, an air duct provided in the drip tip, a base mounted to the drip tip, an atomizing core on the base, and a connecting seal hermetically connecting the atomizing core to the air duct. Embodiments of the present invention further disclose an assembly and e-liquid injection method of an e-liquid filling structure, including installing an atomizing core, pre-installing a connecting seal, injecting e-liquid, and installing a base. An e-liquid injection hole in the embodiments of the present invention not only allows injection of e-liquid but also functions to fasten the atomizing core while another e-liquid filling hole is spared, so that the atomizing core is reliably sealed.

The present invention claims priority to Chinese Patent Application No. 202010753488.0, filed with the China National Intellectual Property Administration on Jul. 30, 2020 and entitled “E-LIQUID FILLING STRUCTURE AND ASSEMBLY AND E-LIQUID INJECTION METHOD”, which is incorporated herein by reference in its entirety.

TECHNICAL FIELD

Embodiments of the present invention belong to the field of aerosol generating devices, and in particular, relate to an e-liquid filling structure and an assembly and e-liquid injection method.

BACKGROUND

As hazards of traditional cigarettes are gradually recognized by the public, electronic cigarettes have been increasingly accepted by smoking consumers, with a gradually expanding market share. An electronic cigarette is essentially an aerosol generating device. A main unit thereof is connected to an atomizing core. A battery in the main unit provides electrical energy to heat a heating element in the atomizing core, atomizing e-liquid in an e-liquid tank to generate aerosol for inhaling by the user.

However, e-liquid filling openings of e-liquid tanks of existing atomizing cores are all provided externally. Although a sealing plug is installed at the filling opening for sealing, the filling opening is difficult to be completely sealed in use when too many seal points are provided in the e-liquid tank. In addition, the sealing plug is prone to loosening and falling off, leading to e-liquid leakage, and making internal air fail to be discharged e-liquid is injected, which not only affects the quality of atomization but also leads to air and e-liquid leakage.

SUMMARY

Embodiments of the present invention are intended to provide an e-liquid filling structure and an assembly and e-liquid injection method, so as to overcome the defects that sealing is difficult to maintain because of the provision of an e-liquid filling hole in an existing aerosol generating device, and that the air and e-liquid are prone to leakage because of the inability to discharge air when filling e-liquid.

To achieve the foregoing objective, an embodiment of the present invention provides an e-liquid filling structure, applied to an aerosol generating device and including: a drip tip, including an inhaling end and a first mounting end, where the drip tip is provided with an e-liquid cartridge inside, the first mounting end is provided with an e-liquid injection hole communicating with the e-liquid cartridge, and the inhaling end is provided with an air duct extending into the e-liquid cartridge; a base, including a second mounting end and a first sealing end, where the second mounting end is connected to the first mounting end, and the first sealing end seals the e-liquid injection hole; an atomizing core, including a first end of an atomizing core and a second end of the atomizing core that are opposite each other, where the first end of the atomizing core is disposed on the base, and the atomizing core second end extends from the e-liquid injection hole into the e-liquid cartridge; and a connecting seal, including a second sealing end and a third sealing end that are opposite each other, where the second sealing end is hermetically connected to the air duct, the third sealing end is hermetically connected to the atomizing core second end, and the connecting seal is provided with a through hole running through the second sealing end and the third sealing end.

Preferably, in the foregoing technical solution, the e-liquid cartridge is provided with a maximum fill line inside.

Preferably, in the foregoing technical solution, the first sealing end is provided with a base silica gel, and the base silica gel is capable of sealing between the e-liquid cartridge and the base.

Preferably, in the foregoing technical solution, the through hole is provided with a first section of a through hole and a second section of a through hole that communicate with each other, the through hole first section extends outward from the second sealing end, and the through hole second section extends outward from the third sealing end.

Preferably, in the foregoing technical solution, a baffle ring is provided between the through hole first section and the through hole second section.

Preferably, in the foregoing technical solution, the e-liquid filling structure further includes an air duct pipe, where the air duct pipe includes an air duct pipe first end and an air duct pipe second end that are opposite each other, the air duct is provided in the air duct pipe and runs through the air duct pipe first end and the air duct pipe second end, the air duct pipe first end is detachably connected to the inhaling end, the air duct pipe second end extends into the e-liquid cartridge, the inhaling end is provided with an inhaling hole, and the inhaling hole allows the air duct to communicate with the outside of the drip tip.

Preferably, in the foregoing technical solution, the air duct pipe second end is able to be sheathed in the through hole first section or sheathe the second sealing end.

Preferably, in the foregoing technical solution, the atomizing core includes: an atomizing core housing, including an atomizing core housing first end and an atomizing core housing second end that are opposite each other, where the atomizing core housing is provided with a heating wire mounting hole and an air hole communicating with the heating wire mounting hole, the heating wire mounting hole extends outward from the atomizing core housing second end, and the atomizing core housing first end is provided on the base; a heating wire provided in the heating wire mounting hole, where atomization cotton is provided between the heating wire and a hole wall of the heating wire mounting hole; and a sealing ring, where the sealing ring is provided at the atomizing core housing first end and capable of sealing between the atomizing core housing and the base.

Preferably, in the foregoing technical solution, the atomizing core housing first end is sheathed in the through hole second section.

In order to achieve the foregoing objective, in another aspect, the embodiments of the present invention further provide an assembly and e-liquid injection method of an e-liquid filling structure, including the foregoing e-liquid filling structure, and the method includes the following specific steps:

S1. installing the atomizing core: installing the atomizing core on the base, and then securing a base silica gel to the base;

S2. pre-installing the connecting seal: installing the air duct pipe in the drip tip, and then pre-installing the second sealing end of the connecting seal to the air duct pipe second end, with a pre-installation distance left such that the connecting seal is temporarily not installed in place;

S3. injecting e-liquid: injecting e-liquid from the e-liquid injection hole to the e-liquid cartridge until an e-liquid level is up to a maximum fill line; and

S4. installing the base: sheathing the third sealing end of the connecting seal in the atomizing core second end of the atomizing core mounted to the base, and then pushing the base slowly down until the base is installed in place, in which case the e-liquid is just enough to fill the e-liquid cartridge and gaps between components.

Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

1. The e-liquid injection hole in the embodiments of the present invention is not only used for e-liquid injection, but also serves as an atomizing core mounting hole, so that the atomizing core is directly fastened in the e-liquid cartridge through the e-liquid injection hole without another e-liquid injection hole provided, thereby improving sealing and reliability of the device.

2. In the embodiments of the present invention, in installing the base, pushing the base to drive the connecting seal to move down can discharge excess air in the e-liquid cartridge from the air duct while sealing is maintained, making the e-liquid cartridge and gaps between various components filled with e-liquid, thereby avoiding air and e-liquid leakage due to air pressure of each part.

3. The e-liquid cartridge is provided with the maximum fill line inside, which enables the user to better control the e-liquid level while filling e-liquid, thereby avoiding e-liquid leakage due to overfilling or incomplete exhaust due to insufficient e-liquid level.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a cross-sectional view of an e-liquid filling structure in an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a drip tip;

FIG. 3 is a cross-sectional view of a base and a base silica gel;

FIG. 4 is a cross-sectional view of an atomizing core;

FIG. 5 is a cross-sectional view of a connecting seal;

FIG. 6 is a cross-sectional view of an air duct pipe;

FIG. 7 is an exploded view of an e-liquid filling structure;

FIG. 8 is a cross-sectional view of an e-liquid filling structure in another embodiment; and

FIG. 9 illustrates a method process of an assembly and e-liquid injection method of an e-liquid filling structure;

FIG. 10 illustrates a method process of an assembly and e-liquid injection method of an e-liquid filling structure;

FIG. 11 illustrates a method process of an assembly and e-liquid injection method of an e-liquid filling structure;

FIG. 12 illustrates a method process of an assembly and e-liquid injection method of an e-liquid filling structure;

Reference signs are described as follows:

-   -   1. drip tip, 11. inhaling end, 12. first mounting end, 13.         e-liquid cartridge, 14. e-liquid injection hole, 15. maximum         fill line, 16. inhaling hole, 17. air duct holder, 18. air duct         pipe mounting hole;     -   2. base, 21. second mounting end, 22. first sealing end, 23.         base silica gel, 24. clamping part, 241. clamping slot, 242.         clamping ring;     -   3. atomizing core, 31. atomizing core first end, 32. atomizing         core second end, 33. atomizing core housing, 34. atomizing core         housing first end, 35. atomizing core housing second end, 36.         heating wire mounting hole, 37. air hole, 38. heating wire, 39.         atomization cotton, 310. sealing ring;     -   4. connecting seal, 41. second sealing end, 42. third sealing         end, 43. through hole, 44. through hole first section, 45.         through hole second section, 46. baffle ring;     -   5. air duct pipe, 51. air duct pipe first end, 52. air duct pipe         second end, 53. air duct;     -   6. leak proof plug;     -   7. nail electrode; and     -   8. e-liquid bottle.

DESCRIPTION OF EMBODIMENTS

The specific implementations of the embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the embodiments of the present invention is not limited by the specific implementations.

As shown in FIG. 1 to FIG. 7 , an e-liquid filling structure in the embodiments includes: a drip tip 1, an inhaling end 11, a first mounting end 12, an e-liquid cartridge 13, an e-liquid injection hole 14, a maximum fill line 15, an inhaling hole 16, an air duct holder 17, an air duct pipe mounting hole 18, a base 2, a second mounting end 21, a first sealing end 22, a base silica gel 23, a clamping part 24, a clamping slot 241, a clamping ring 242, an atomizing core 3, a first end of an atomizing core 31, a second end of the atomizing core 32, an atomizing core housing 33, an atomizing core housing first end 34, an atomizing core housing second end 35, a heating wire mounting hole 36, air holes 37, a heating wire 38, atomization cotton 39, a sealing ring 310, a connecting seal 4, a second sealing end 41, a third sealing end 42, a through hole 43, a first section of a through hole 44, a second section of a through hole 45, a baffle ring 46, an air duct pipe 5, an air duct pipe first end 51, an air duct pipe second end 52, an air duct 53, and nail electrodes 7.

The drip tip 1 includes the inhaling end 11 and the first mounting end 12 that are opposite each other. The drip tip 1 is further provided with the e-liquid cartridge 13 inside. One end of the e-liquid cartridge 13 extends outward from the first mounting end 12 and forms the e-liquid injection hole 14. The inhaling end 11 is provided with the air duct holder 17, where the air duct holder 17 protrudes into the e-liquid cartridge 13 and is provided with the air duct pipe mounting hole 18 and the inhaling hole 16 communicating with the air duct pipe mounting hole 18. The inhaling hole 16 extends from the inhaling end 11 toward the outside of the drip tip 1, and the air duct pipe mounting hole 18 points into the e-liquid cartridge 13.

The air duct pipe 5 includes the air duct pipe first end 51 and the air duct pipe second end 52 that are opposite each other. The air duct 53 is provided in the air duct pipe 5 and runs through the air duct pipe first end 51 and the air duct pipe second end 52. The air duct pipe first end 51 is sheathed in the air duct pipe mounting hole 18 through an interference fit, the air duct pipe second end 52 extends into the e-liquid cartridge 13, and the air duct 53 communicates with the inhaling hole 16.

It can be understood that the air duct pipe 5 can alternatively be connected to the air duct pipe mounting hole 18 through a threaded engagement.

The base 2 includes the second mounting end 21 and the first sealing end 22 that are opposite each other. The second mounting end 21 is provided with the clamping part 24 protruding outward from the base 2, and the clamping part 24 is provided with the clamping slot 241 that is recessed inward. The first sealing end 22 can extend into the e-liquid cartridge 13, and the base silica gel 23 is mounted to the first sealing end 22, and annular sealing lines that protrude outward are provided at a circumference of the base silica gel 23 and form an interference fit with the e-liquid cartridge 13 to seal the gap between the e-liquid cartridge 13 and the base 2. The first mounting end 12 is provided with the clamping ring 242 protruding outward, and the clamping ring 242 fits with the clamping slot 241 to fixedly connect the second mounting end 21 to the first mounting end 12.

It can be understood that the connection between the second mounting end 21 and the first mounting end 12 is not limited to the fixed connection using the clamping part 24 herein through clamping, and may alternatively be threaded or magnetic connection.

The atomizing core 3 includes the first end of the atomizing core 31 and the atomizing core second end 32 that are opposed each other. The atomizing core 3 is mainly composed of the atomizing core housing 33, the heating wire 38, the atomization cotton 39, and the sealing ring 310.

The atomizing core housing 33 includes the atomizing core housing first end 34 and the atomizing core housing second end 35 that are opposite each other, where the atomizing core housing first end 34 is the first end of the atomizing core 31, and the atomizing core housing second end 35 is the atomizing core second end 32. The heating wire mounting hole 36 is provided in the atomizing core housing 33, and one end of the heating wire mounting hole 36 extends outward from the atomizing core housing second end 35. A plurality of air holes 37 are provided in a side face of the atomizing core housing 33, and the air holes 37 allow the heating wire mounting hole 36 to communicate with the outside of the atomizing core housing 33. The heating wire 38 is sheathed in the heating wire mounting hole 36, and an periphery of the heating wire 38 is surrounded by a layer of atomization cotton 39 which is located between the heating wire 38 and the air holes 37. The atomizing core housing first end 34 is sheathed by the sealing ring 310 and mounted to the base 2, where the sealing ring 310 is capable of sealing between the atomizing core housing 33 and the base 2. The atomizing core housing second end 35 extends into the e-liquid cartridge 13 and directly faces the air duct pipe second end 52, and the second mounting end 21 of the base 2 is provided with two nail electrodes 7.

The main body of the connecting seal 4 is made of a silica gel material. The connecting seal 4 includes the second sealing end 41 and the third sealing end 42 that are opposite each other, and is provided with the through hole 43 inside. The through hole 43 runs through the second sealing end 41 and the third sealing end 42 and is divided into the through hole first section 44 and the through hole second section 45, where the through hole first section 44 extends outward from the second sealing end 41, and the through hole second section 45 extends outward from the third sealing ends 42. The baffle ring 46 protruding into the through hole 43 is fastened between the through hole first section 44 and the through hole second section 45, thereby separating the through hole first section 44 from the through hole second section 45. Protruding annular sealing lines are provided on inner walls of the through hole first section 44 and the through hole second section 45. The air duct pipe second end 52 is sheathed in the through hole first section 44, and the atomizing core housing first end 34 is sheathed in the through hole second section 45, so that the connecting seal 4 communicate the air duct 53 in the air duct pipe 5 with the heating wire mounting hole 36 in the atomizing core housing 33 and seals the gap between them.

In addition, as shown in FIG. 3 , another implementation of the embodiments is that protruding annular sealing lines are provided on an outer wall of the second sealing end 41 in the connecting seal 4, and the part of the air duct 53 in the air duct pipe second end 52 sheathes the second sealing end 41 and is in interference fit with the annular sealing lines provided thereon for sealing between the air duct pipe 5 and the connecting seal 4.

In addition, the embodiments further disclose an assembly and e-liquid injection method of an e-liquid filling method, including the foregoing e-liquid filling structure. The method includes the following specific steps:

S1. Install the atomizing core: install the atomizing core 3 on the base 2, and then secure the base silica gel 23 to the base 2.

S2. Pre-install the connecting seal: as shown in FIG. 8(a), install the air duct pipe 5 in the drip tip 1, and then pre-install the second sealing end 41 of the connecting seal 4 to the air duct pipe second end 52, with a pre-installation distance left as shown in FIG. 8(b) such that the connecting seal 4 is temporarily not installed in place.

S3. Inject e-liquid: as shown in FIG. 9 , install a leak proof plug in the inhaling hole 16, and then inject e-liquid to the e-liquid cartridge from the e-liquid injection hole by using an e-liquid bottle, with the e-liquid injected around the air duct pipe 5, and stop injecting e-liquid when the e-liquid level is up to the maximum fill line 15.

S4. Install the base: as shown in FIG. 10 , sheathe the third sealing end 42 of the connecting seal 4 in the atomizing core second end 32 of the atomizing core 3 mounted to the base 2; as shown in FIG. 11(a), push the base 2 slowly down until the base 2 is installed to the place shown in FIG. 11(b), in which case the e-liquid is just enough to fill the e-liquid cartridge 13 and gaps between components; and as shown in FIG. 12 , pushing down the base 2 can press the air in the e-liquid cartridge into the heating wire mounting hole 36 through the air holes 37 in the atomizing core 3 and then into the air duct 53, so as to discharge the air.

In summary, the e-liquid injection hole in the embodiments of the present invention not only allows injection of e-liquid but also functions to fasten the atomizing core while another e-liquid filling is spared, so that the atomizing core is reliably sealed. Moreover, the e-liquid injection hole allows air in the e-liquid cartridge to discharge from the air duct and e-liquid to saturate the cartridge when the pre-installed connecting seal is pushed in installation of the base.

The foregoing descriptions for the specific exemplary implementations of the embodiments of the present invention are for the purpose of illustration and exemplification. These descriptions are not intended to limit the embodiments of the present invention to the disclosed precise forms, and it is obvious that many changes and variations can be made based on the above teachings. The purpose of selecting and describing exemplary embodiments is to explain specific principles and practical applications of the embodiments of the present invention, such that those skilled in the art can implement and utilize various exemplary implementations of the embodiments of the present invention and make various choices and changes. The scope of the embodiments of the present invention is defined by the claims and their equivalents. 

1. An e-liquid filling structure, applied to an aerosol generating device and comprising: a drip tip, comprising an inhaling end and a first mounting end, wherein the drip tip is provided with an e-liquid cartridge inside, the first mounting end is provided with an e-liquid injection hole communicating with the e-liquid cartridge, and the inhaling end is provided with an air duct extending into the e-liquid cartridge; a base, comprising a second mounting end and a first sealing end, wherein the second mounting end is connected to the first mounting end, and the first sealing end seals the e-liquid injection hole; an atomizing core, comprising a first end of an atomizing core and a second end of an atomizing core opposite each other, wherein the first end of the atomizing core is disposed on the base, and the second end of the atomizing core extends from the e-liquid injection hole into the e-liquid cartridge; and a connecting seal, comprising a second sealing end and a third sealing end that are opposite each other, wherein the second sealing end is hermetically connected to the air duct, the third sealing end is hermetically connected to the second end of the atomizing core, and the connecting seal is provided with a through hole running through the second sealing end and the third sealing end.
 2. The e-liquid filling structure according to claim 1, wherein the e-liquid cartridge is provided with a maximum fill line inside.
 3. The e-liquid filling structure according to claim 1, wherein the first sealing end is provided with a base silica gel, and the base silica gel is capable of sealing between the e-liquid cartridge and the base.
 4. The e-liquid filling structure according to claim 1, wherein the through hole is provided with a first section of a through hole and a second section of a through hole that communicate with each other, the first section of the through hole extends outward from the second sealing end, and the second section of the through hole extends outward from the third sealing end.
 5. The e-liquid filling structure according to claim 4, wherein a baffle ring is provided between the first section of the through hole and the second section of the through hole.
 6. The e-liquid filling structure according to claim 5, further comprising an air duct pipe, wherein the air duct pipe comprises a first end of an air duct pipe and a second end of an air duct pipe opposite each other, the air duct is provided in the air duct pipe and runs through the first end of the air duct pipe and the second end of the air duct pipe, the first end of the air duct pipe is detachably connected to the inhaling end, the second end of the air duct pipe extends into the e-liquid cartridge, the inhaling end is provided with an inhaling hole, and the inhaling hole allows the air duct to communicate with the outside of the drip tip.
 7. The e-liquid filling structure according to claim 6, wherein the second end of the air duct pipe is able to be sheathed in the first section of the through hole or sheathe the second sealing end.
 8. The e-liquid filling structure according to claim 5, wherein the atomizing core comprises: an atomizing core housing, comprising a first end of an atomizing core housing and a second end of an atomizing core housing that are opposite each other, wherein the atomizing core housing is provided with a heating wire mounting hole and an air hole communicating with the heating wire mounting hole, the heating wire mounting hole extends outward from the atomizing core housing second end, and the first end of the atomizing core housing is provided on the base; a heating wire provided in the heating wire mounting hole, wherein atomization cotton is provided between the heating wire and a hole wall of the heating wire mounting hole; and a sealing ring, wherein the sealing ring is provided at the first end of the atomizing core housing and capable of sealing between the atomizing core housing and the base.
 9. The e-liquid filling structure according to claim 8, wherein the first end of the atomizing core housing is sheathed in the second section of the through hole.
 10. An assembly and e-liquid injection method of an e-liquid filling structure, comprising an e-liquid filling structure, wherein the e-liquid filling structure comprises: a drip tip, comprising an inhaling end and a first mounting end, wherein the drip tip is provided with an e-liquid cartridge inside, the first mounting end is provided with an e-liquid injection hole communicating with the e-liquid cartridge, and the inhaling end is provided with an air duct extending into the e-liquid cartridge; a base, comprising a second mounting end and a first sealing end, wherein the second mounting end is connected to the first mounting end, and the first sealing end seals the e-liquid injection hole; an atomizing core, comprising a first end of an atomizing core and the second end of the atomizing core that are opposite each other, wherein the first end of the atomizing core is disposed on the base, and the second end of the atomizing core extends from the e-liquid injection hole into the e-liquid cartridge; and a connecting seal, comprising a second sealing end and a third sealing end that are opposite each other, wherein the second sealing end is hermetically connected to the air duct, the third sealing end is hermetically connected to the second end of the atomizing core, and the connecting seal is provided with a through hole running through the second sealing end and the third sealing end; and the method comprises the following specific steps: S1. installing the atomizing core: installing the atomizing core on the base, and then securing a base silica gel to the base; S2. pre-installing the connecting seal: installing the air duct pipe in the drip tip, and then pre-installing the second sealing end of the connecting seal to the second end of the air duct pipe, with a pre-installation distance left such that the connecting seal is temporarily not installed in place; S3. injecting e-liquid: injecting e-liquid from the e-liquid injection hole to the e-liquid cartridge until an e-liquid level is up to a maximum fill line; and S4. installing the base: sheathing the third sealing end of the connecting seal in the second end of the atomizing core of the atomizing core mounted to the base, and then pushing the base slowly down until the base is installed in place, in which case the e-liquid is just enough to fill the e-liquid cartridge and gaps between components.
 11. The assembly and e-liquid injection method of an e-liquid filling structure according to claim 10, wherein the e-liquid cartridge is provided with the maximum fill line inside.
 12. The assembly and e-liquid injection method of an e-liquid filling structure according to claim 10, wherein the first sealing end is provided with the base silica gel, and the base silica gel is capable of sealing between the e-liquid cartridge and the base.
 13. The assembly and e-liquid injection method of an e-liquid filling structure according to claim 10, wherein the through hole is provided with a first section of a through hole and a second section of a through hole that communicate with each other, the first section of the through hole extends outward from the second sealing end, and the second section of the through hole extends outward from the third sealing end.
 14. The assembly and e-liquid injection method of an e-liquid filling structure according to claim 13, wherein a baffle ring is provided between the first section of the through hole and the second section of the through hole.
 15. The assembly and e-liquid injection method of an e-liquid filling structure according to claim 14, further comprising an air duct pipe, wherein the air duct pipe comprises a first end of an air duct pipe and a second end of an air duct pipe that are opposite each other, the air duct is provided in the air duct pipe and runs through the first end of the air duct pipe and the second end of the air duct pipe, the first end of the air duct pipe is detachably connected to the inhaling end, the second end of the air duct pipe extends into the e-liquid cartridge, the inhaling end is provided with an inhaling hole, and the inhaling hole allows the air duct to communicate with the outside of the drip tip.
 16. The assembly and e-liquid injection method of an e-liquid filling structure according to claim 15, wherein the second end of the air duct pipe is able to be sheathed in the first section of the through hole or sheathe the second sealing end.
 17. The assembly and e-liquid injection method of an e-liquid filling structure according to claim 14, wherein the atomizing core comprises: an atomizing core housing, comprising a first end of an atomizing core housing and a second end of an atomizing core housing that are opposite each other, wherein the atomizing core housing is provided with a heating wire mounting hole and an air hole communicating with the heating wire mounting hole, the heating wire mounting hole extends outward from the second end of the atomizing core housing, and the first end of the atomizing core housing is provided on the base; a heating wire provided in the heating wire mounting hole, wherein atomization cotton is provided between the heating wire and a hole wall of the heating wire mounting hole; and a sealing ring, wherein the sealing ring is provided at the first end of the atomizing core housing and capable of sealing between the atomizing core housing and the base.
 18. The assembly and e-liquid injection method of an e-liquid filling structure according to claim 17, wherein the first end of the atomizing core housing is sheathed in the second section of the through hole. 